Oil filter



Dec. 4, 1951 Bh VON PEN-rz K 2,577,169

OIL FILTER Filed March 29, 1949. 2 SHEETS- SHEET 2 Patented Dec. 4, 1951UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to oil filters and has for an object to providean oil filter for use on automobile engines and similarl engines whereinthe filter quickly removes large particles of dirt and then removes thesmall impurities in the oil, including water, gasoline, and the like.

A further object of the invention is to provide an oil filter which isself-contained and readily removable for replacement purposes.

A further object of the invention is to provide an oil lter whichpresents a substantial surface through which oil can enter the filteringmediums and can be filtered with appreciable rapidity.

A still further object of the invention is to provide an oil nlterthrough which the oil travels in the general direction ol the transverseaxis of the filter so that the oil travels through a substantialquantity of filtering mediums, thus insuring a greaterfdegree offiltration.

Another object of the invention is to provide an oil lter which is somade that the oil enters through the sides rather than through thebottom so that sludge and other impurities can settle at the bottom ofthe casing and can be drained from such casing.

A further object of the invention is to provide anoil. filter which hasaperforated core with a lap seam so that the core can expand to keep theltering mediums in frictional engagement with the container and witheach other and so that the core can contract when the filteringmediums-becoming impregnated with oil-swell up. Suchcontracting preventsthe collapse of the core or the container walls, or both.

With these and other objects in View, the invention consists in certainnovel features of construction and combination which will be more fullyhereinafter described and pointed out in the claim.

In the accompanying drawings- Figure 1 is a longitudinal verticalsectional View through an oil filter, and casing in which such oil lteris mounted, disclosing an embodiment of the invention;

Fig. 2 is an enlarged View of the oil filter with a portion broken awayto show the interior construction;

Fig. 3 is a transverse sectional view through Fig. 2 approximately onthe line 3--3;

Fig. 4 is a fragmental View of a portion of Fig. 2 showing the coursetaken by the oil in the filtering process;

Fig. 5 is a view of the core and spiral band; and

(Cl. 21o-183) Fig. 6 is a transverse sectional view through Fig. 5approximately on line 6 6.

Referring to the accompanying drawings by numerals, Il) indicates thefiltering device consisting of a metal container II, the sides of whichhave a series of grooves I2 to give added strength, and a series ofholes I3.

The bottom wall I4 and the top wall I5 of the container II each have inthe center thereof one hole I6. These holes are concentric with eachother and have flanges around their periphery, the iiange I'I in thebottom wall Il being bent upwardly and the Iiange I8 in the top wall I5being bent downwardly. The perforated core I9 which has a lap seam 2t ismounted on the aforementioned flanges I'I and I8 in the center of thecontainer II. This core is preferably hexagonal.

The container II is mounted in the casing 2I and on the outlet pipe 22,which outlet pipe passes through the holes I6 and the core I9. The upperportion 23 of the outlet pipe 22 is threaded. The cap 24y is bolted ontothe top of the casing 2l by means of the nut 25 which is threaded ontothe upper portion 23 cf the outlet pipe 22.

This cap 24 has flanges 26 which engage the flanges 2l of the casing 2I.A sealed closure is maintained by the gasket 28. The spring 29 exerts anupward thrust to the filtering device In and the washers 39 and 3Iprovide a sealed closure between the outlet pipe 22 and the flange I1 ofthe hole I6. The extent of the upward thrust of the spring 29 is limitedby the sleeve 32 which, in turn, keeps the washer 33 is pressure contactwith the top wall I5 of the container II. This washer 33 provides asealed closure between the outlet pipe 22 and the flange I8 in the holeI6.

In the top wall I5 of the container II is an annular ring 3d whichfacilitates the lifting of the filtering device III out of the casing 2Iafter the cap 24 is removed. The bottom and top walls I4 and I5 of thecontainer II are reinforced by ribs 35.

A drain plug 36 is inserted at the bottom of the casing 2I having forits purpose the draining of sediment and the like which settles at thebottom of the chamber 31.

The spiral band 38 shown in Fig. 5 consists of a portion of cloth 39,preferably loosely woven, one end of which is cemented to the core I 9and the other end of which is cemented to a strip of heavy paper 40.This paper is perforated with a series of staggered holes 4I and isimpregnated waste cotton orl other; filtering fiberrin a more or;l

less loose state.

The spiral band, with 4this layer 43, is wound around the perforatedcore i9. the spiral band and filtering medium is then mounted inside thecontainer Ilthe bottom of the core engaging the flange' I1" inthebottom" wall I4. The top wall l5 thellolosesvthe. container Il withthe top of the core I9 engaging the ange I S. The container is thenmounted'f on the outlet pipe 22 inside the casing 2l and on top of thespring-29 and washers 3B and.V 3i. The washer 33 andthesleeve;32fis"then mounted at the top portion of outletfpipe 2'2; and'thexcap Z'is put on top -of the-casing 21|:

gasket 28'- a'nd the nut 25: Y

In operation, oil enters the casing 2l under.

some pressure through the-inletzpipe- All. This oil has no means-ofoutlet other than through the holes |31 inthe container'V Il throughWhichwit enters the filtering device Ill. IByr reasonofithe impregnationof the paper with wax lor the. like,

the oil-after passinglthrougha portion of theV clotha-ndlteringvmedium-andarriving at the paper-takcs the path of'least`resistance, viz.,v goes through the holes-d. These holes, beingstaggered, the oi-l which is still under some pressure must follow atortuous path asindcatedby the arrows in'liig. f1 before itfcan reachthe holes in the next layer--ofpa-per; Consequently,

the oil which finally comes tothe: corelil` has:

traveled throughfa much greater arnounto llteringmed-ium than it wereallowed -to pass in ai direct transverse line from the-outside conetainer it to the coreHi'S; Accordingly; the -oil is- When the fil--ltered to a much greater degree. tered oil passesr throughthe'perforations inthe corev IS, it ows out of the viiltering device i0-and the casing 2l throughoutletpipeZ-*to adesired point.

The core With'- Thisfcap then sealed to the casingl 2l-fby: means of,the`

While the invention has been described in detail with respect to apresent preferred form which it may assume, it is not to be limited tosuch details and form since many changes and modifications may be madein the invention without departing from the spirit and scope of theinvention in its broadest aspects. Hence, it is desired to cover any andall forms and modifications of the invention which may come within thelanguage or scope of the appendedclaim.

I'clairn:A

A filtering device which comprises a casing having an upper lateralinlet pipe, and a central: lower outlet pipe in its bottom wall, acontainer disposed within said'casing, and having imperforatetop" andbottom walls and a perforated peripheral wall, a lter element within thecontainer comprising a central strip metal perforated core withunconnected overlapped edges, a band of spaced lengthssof cloth with anintermediate length of "impregnated paper Awith lstaggered; holes.therein;,a.1ayer ofV loose brous Ina-A terial laidalong` oneiface ofsaidbaDd, saidv band. and material being rolled upV around. the coreYtov fill the: container, and` au. perforated pipe extending through saidcoreand connectedatlits lower end tothe-outlet pipein- `the casing.-

BENJAMIN H; VON PENTZ.

REFERENCES 'CITED The iellowing referencesareof record. in thef le ofthis patent:

UNITED STATES vPATENTS Number Name Date- 1, l90,920 Godward Apr. 22,1924 1,565,988- Cottrell .Dec. 15,1925, 1,800,625 Hall etal.` Apr. V14,v1931Y 1,898,627 Winslow 1 Feb.- 21,v 1933 2,007,753 Ericson .July 9,1935 2,082,322 Brundage June 1, 1937. 2 173,978, Pennebaker Sept. v26,.1939- 2,-2,72,583 l'1.eed.f. Y Feb. 10, 1,942; 2,325,399 Houston ,Jul-y27, 1943 2,345,849 Winslow etal. Apr. 4,;1944 2,363.5766 Levier Dec..26, 1944 2,367,745 Wicks; Jan. 23,v 1945. 2,427,733

